激光技术
激光技術
격광기술
LASER TECHNOLOGY
2013年
6期
786-790
,共5页
光信号处理%小波去噪%分布式算法%查表法%现场可编程门阵列
光信號處理%小波去譟%分佈式算法%查錶法%現場可編程門陣列
광신호처리%소파거조%분포식산법%사표법%현장가편정문진렬
optical signal processing%wavelet denoising%distributed algorithm%look-up table method%FPGA
为了解决传统频域去噪法在光信号处理中单分辨率的局限性，提出了具有多分辨性的小波去噪法，并通过对比验证其有效性。由于小波去噪实现对硬件的要求较高，采用现场可编程门阵列做硬件平台来实现基于分布式算法的小波运算，将复杂的乘法运算转化为简单的并行查表累加过程，提高了运算效率，完成了小波算法的硬件移植。最后设计了基于现场可编程门阵列的采集系统，并在其上进行了小波去噪的硬件验证。结果表明，小波去噪算法在现场可编程门阵列平台上得到了很好的实现，且去噪效果良好。
為瞭解決傳統頻域去譟法在光信號處理中單分辨率的跼限性，提齣瞭具有多分辨性的小波去譟法，併通過對比驗證其有效性。由于小波去譟實現對硬件的要求較高，採用現場可編程門陣列做硬件平檯來實現基于分佈式算法的小波運算，將複雜的乘法運算轉化為簡單的併行查錶纍加過程，提高瞭運算效率，完成瞭小波算法的硬件移植。最後設計瞭基于現場可編程門陣列的採集繫統，併在其上進行瞭小波去譟的硬件驗證。結果錶明，小波去譟算法在現場可編程門陣列平檯上得到瞭很好的實現，且去譟效果良好。
위료해결전통빈역거조법재광신호처리중단분변솔적국한성，제출료구유다분변성적소파거조법，병통과대비험증기유효성。유우소파거조실현대경건적요구교고，채용현장가편정문진렬주경건평태래실현기우분포식산법적소파운산，장복잡적승법운산전화위간단적병행사표루가과정，제고료운산효솔，완성료소파산법적경건이식。최후설계료기우현장가편정문진렬적채집계통，병재기상진행료소파거조적경건험증。결과표명，소파거조산법재현장가편정문진렬평태상득도료흔호적실현，차거조효과량호。
In order to solve the limitation of single resolution in optical signal processing with traditional frequency domain denoising method , a multi-resolution wavelet denoising method was put forward .The effectiveness of wavelet denoising method was verified through contrast .According to the high requirements of hardware platform in wavelet denoising method , a field-programmable gate array ( FPGA) was put forward as hardware platform .The wavelet denoising method based on distributed algorithm transforms complicated multiplication to simple parallel look -up table accumulation process.It improved the computational efficiency and completed the hardware transplantation .A storage testing system based on FPGA was designed and the hardware verification was realized .Experimental results showed that the denoising effect was well realized on FPGA .
